2001 Hyundai Elantra All four windows won't work radio headlights won't turn on and running lights don't turn on replaced all fuse and relays and still having these problems what do I do to fix it

Car may have fusible links, usually located near battery + connector or starter motor big plus connector. If you are not familiar with these, they are just sections of wires that are special sections designed to burn out if some major circuit shorts or draws too many amps. Parts stores carry replacements.

Possible ignition switch. Try gently rocking the key back and forth in the ignition cylinder with the vehicle running without turning the vehicle off. While performing this procedure, try working the windows or have the headlight in the on position to see if it corrects the problem. If the accessories start working,suspect an ignition switch